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09ba4279-0bde-4476-aec1-0caceb179010 69 Reg Curry 2 4 true false false 0 0 decimal

&[DATE] &[TIME] - &[FILENAME]

al_nleqsolve TESTING

Data2 WORLD EMISSION DATA VS DATE.xlsx Sheet 2 A2:C173 importData.XLSX :

Data2 1850.00 1.97 108^* 2.62 109^* 1851.00 1.99 108^* 2.71 109^* 1852.00 2.08 108^* 2.76 109^* 33 mat

X Data2 1 col :

Y 109 -^Data2 2 col * :

We avoid some numerical issues taking (t-to)/to for the independent variable

to X min eval :

X max 2021.00

to 1850.00

t u fit a b c 13 mat u 1 el u 2 el u 3 el 13 mat : a b e c t to - to / *^* + vectorize 21 line :

abc.Mathcad 4.9939 1014 -^* 1.7038 102 -^* 2.6749 101 -^* - 31 mat :

a b c 31 mat u 1 el u 2 el u 3 el 31 mat :

t u fit a b e c t to - to / *^* + vectorize :

WHY IS THIS NOT AND EQUIVALENT ALTERNATIVE?

u 1 - 1131 mat u φ X u fit Y - : al_nleqsolve : 1.9492 - 1.3453 37.4083 31 mat

https://en.wikipedia.org/wiki/Logistic_function

Mathcad solution gives the same norme

X to + 4.9939 1014 -^* 1.7038 102 -^* to * 2.6749 101 -^* - 31 mat f.3 Y - norme #

Plot t u fit X Y augment 21 sys :

X to + 4.9939 1014 -^* 1.7038 102 -^* to * 2.6749 101 -^* - 31 mat f.3 X u.3 f.3 - normi #

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